Hi-Vis Compliance Guide: AS/NZS 4602.1 Class D, N and D/N Explained
Quick answer: under AS/NZS 4602.1, the Australian and New Zealand standard for high-visibility safety garments, Class D garments are for daytime work, Class N garments are for night work and rely on retroreflective tape, and Class D/N garments cover both. If your crew works any hours outside full daylight — early starts, late finishes, overcast winter afternoons or night shifts — taped Class D/N garments are the safe default.
What is AS/NZS 4602.1?
AS/NZS 4602.1 (High visibility safety garments — garments for high risk applications) is the standard that defines how much high-visibility material a garment must carry, where that material must sit on the body, and which colours and reflective materials are acceptable. It works alongside AS/NZS 1906.4, the companion standard that specifies the performance of the fluorescent fabrics and retroreflective tapes themselves. A compliant garment carries a label citing AS/NZS 4602.1 and its class — if the label does not say it, do not assume it complies.
Employers select hi-vis under their WHS risk assessment: the class of garment must match the lighting conditions and traffic risk of the actual work, not just the job title.
Class D vs Class N vs Class D/N at a glance
| Class D (Day) | Class N (Night) | Class D/N (Day/Night) | |
|---|---|---|---|
| Seen by | Daylight contrast — fluorescent or approved high-visibility colour | Vehicle headlights reflecting off tape | Both mechanisms |
| Key requirement | At least 0.2 m² of high-visibility material on the front of the torso and 0.2 m² on the back | Retroreflective tape complying with AS/NZS 1906.4, applied in the configurations set out in the standard | Meets the Class D material requirement and the Class N tape requirement |
| Reflective tape | Not required | Required | Required |
| Typical garments | Day-only vests, polos and shirts | Rare as a stand-alone class — night-only garments | Taped vests, shirts, jackets and rainwear |
| Use it when | All work happens in full daylight | Work is at night only | Any mix of day, dawn, dusk or night work |
Bottom line: Class D is the minimum for daytime outdoor work near plant or traffic; the moment work extends into poor light, only a taped garment (Class N or D/N) keeps the wearer visible to headlights. Most Australian sites standardise on Class D/N because one garment covers every shift.
Colour rules: fluorescent fabrics and AS 2700
Daytime visibility comes from colour contrast, so AS/NZS 4602.1 restricts what counts as a high-visibility colour:
- Fluorescent materials (the familiar hi-vis yellow and orange) must meet AS/NZS 1906.4. Fluorescent fabric converts UV light into visible light, which is why it stays vivid in dull daylight.
- Non-fluorescent high-visibility colours are defined by reference to AS 2700, the Australian colour standard — only the specified strong yellow and orange-red shades qualify. A bright colour is not automatically a compliant colour.
- Fading matters. Fluorescent dye degrades with UV exposure and washing. A faded, greyed-out shirt no longer delivers the daytime contrast the standard assumes — replace hi-vis once the colour has visibly dulled, and always follow the care label.
Some industries add their own colour rules on top: many rail networks, for example, mandate specific colours for track workers, and your site's traffic management plan may specify colour or garment type. Check the site requirement before you standardise a uniform.
When are taped garments required?
Retroreflective tape is what headlights pick up, so taped (Class N or D/N) garments are required whenever workers can be near moving vehicles or plant in anything less than full daylight. In practice that means:
- Night work — road crews, traffic controllers, emergency and breakdown response.
- Early starts and late finishes — civil, construction and transport shifts that begin before sunrise or run past sunset.
- Poor daytime visibility — heavy rain, fog, smoke or deep shade. Wet-weather gear worn at night needs compliant tape too, which is why taped rainwear exists as its own category.
- Enclosed or dim workplaces — warehouses, tunnels and undercover yards where forklifts and trucks operate under artificial light.
The tape must itself comply with AS/NZS 1906.4 and be applied in the patterns the standard allows — the most common is a hooped configuration around the torso, and garments are also produced with shoulder patterns for greater coverage. Buying a certified garment means the placement has already been engineered for you.
Who needs which class?
| Role / scenario | Recommended class |
|---|---|
| Landscaping, delivery or trades work in daylight hours only | Class D |
| Civil construction and roadwork with early starts or night shifts | Class D/N |
| Traffic control | Class D/N (state road authority rules may add requirements) |
| Warehouse and logistics around forklifts, day and night | Class D/N |
| Night-only maintenance or towing work | Class N or D/N |
| Rail corridor work | Class D/N in the colour the network mandates |
Buying checklist
- The garment label cites AS/NZS 4602.1 and states the class (D, N or D/N).
- The class matches the worst lighting conditions the wearer will face, not the best.
- Colour meets the fluorescent (AS/NZS 1906.4) or AS 2700 non-fluorescent requirement — and any site or network colour rule.
- Taped garments for any dawn, dusk or night exposure, including rainwear.
- Fit allows the hi-vis area to stay visible — unzipped jackets flapping open reduce the visible area the standard relies on.
Shop compliant hi-vis
Max Global Products stocks certified hi-vis from Hard Yakka, King Gee, Bisley, Syzmik, Portwest, DNC and JB's Wear, and we can add your logo in-house with embroidery or screen printing without affecting compliance areas.
- Hi-vis workwear — the full certified range
- Safety vests — day and day/night options
- Work shirts and polos and jackets and vests
- Flame-resistant workwear for hot-work environments
Frequently asked questions
Is a Class D/N garment always the safest choice?
It is the most versatile choice. Class D/N meets both the daytime material requirement and the night-time tape requirement, so one garment covers every shift pattern. The trade-off is cost and, in hot weather, the extra tape on the garment — if a team genuinely never works outside full daylight, Class D is compliant and cooler.
Does printing or embroidering a logo void hi-vis compliance?
Not if it is placed correctly. Decoration must not cover the minimum area of high-visibility material or the reflective tape. We decorate hi-vis in-house every week and position logos so garments remain compliant — ask us when you request a quote.
How long does hi-vis stay compliant?
Until it no longer meets the visual requirements: faded fluorescent fabric, cracked or peeling tape, and heavy soiling all reduce visibility. Inspect garments regularly and replace them when the colour has dulled or the tape no longer reflects — a garment can be intact but no longer conspicuous.
This guide is general information to help you buy the right garment class. Your workplace risk assessment, traffic management plan and any industry-specific rules determine the final requirement. Need help matching garments to a site requirement? Call (02) 6056 6685 or send us the spec — we supply certified hi-vis Australia-wide from Wodonga, Victoria.